Straying Off Topic I know but re the anchor light when moored and nav lights on a dinghy .... they are purely local regulations correct ?
Not local, federal regs. Local can be even more strict;
Navigation Rules Online
Rule 23 - Power-driven Vessels Underway Return to the top of the page
(a) A power-driven vessel underway shall exhibit (click on icon to see picture
Power Driven Vessel Underway 50m or greater
(i) a masthead light forward;
(ii) a second masthead light abaft of and higher than the forward one; except that a vessel of less than 50 meters in length shall not be obliged to exhibit such a light but may do so;Power Driven Vessel Underway less than 50m
(iii) sidelights: and
(iv) a sternlight.
(b) An air-cushion vessel when operating in nondisplacement mode shall, in addition to the lights prescribed in paragraph (a) Air Cushion Vessel in Displacement Mode of this Rule, exhibit an all-round flashing yellow light, where it can best be seen. Air Cushion Vessel in Nondisplacement Mode
[(c) A WIG craft only when taking off, landing and in flight near the surface shall, in addition to the lights prescribed in paragraph (a) of this Rule, exhibit a high intensity all-round flashing red light.]
(c | d) (i) A power-driven vessel of less than 12 meters in length may in lieu of the lights prescribed in paragraph (a) of this Rule exhibit an all-round white light and sidelights. Power Driven Vessel less than 12m
[(ii) a power-driven vessel of less than 7 meters in length whose maximum speed does not exceed 7 knots may in lieu of the lights prescribed in paragraph (a) of this Rule exhibit an all-round white light and shall, if practicable, also exhibit sidelights.] Power Driven Vessel less than 7m
[(iii) the masthead light or all-round white light on a power-driven vessel of less than 12 meters in length may be displaced from the fore and aft centerline of the vessel if centerline fitting is not practicable, provided the sidelights are combined in one lantern which shall be carried on the fore and aft centerline of the vessel or located as nearly as practicable in the same fore and aft line as the masthead light or the all-round white light.]